NASA's Terrestrial Planet Finder aims to directly detect extrasolar earth-like planets as candidates for spectroscopic searches for extraterrestrial life. Target characterization and selection is critical to the success of this goal. Factors such as 1) the presence of circumstellar dust, 2) binary and brown dwarf companions, and 3) stellar ages will play important roles in the likelihood of detection. These features are also important in their own right to scientific issues of stellar astrophysics and planetary origins. NASA's NStars Database was created to support the compilation of nearby circumstellar contents in advance of Terrestrial Planet Finder. This relational database catalogs all stars known to be within 25 pc, together with relevant data on stellar properties and circumstellar contents. Recently, the database was moved to Northern Arizona University as a focus for observational studies and compilations that will expand and complete its inventory. In this talk, I will review current and planned features of the database, together with associated research at NAU.